Fire extinguisher



"July l1, 1933- c. l.. PAuLus Er A1.

FIRE EXTINGUISHER Filed April 11, 1951 Patented July 11, 1933 UNITED STATES PATENT OFFICE FIRE EXTINGUISHER Application filed April 11,

r'his invention relates to fire extinguishers, and has for its object to provide a device of this class which may be operated by one hand.

g The invention is particularly applicable for aircraft .as its use permits one hand of the pilot to be available for the manipulation of his plane.

The invention also facilitates the fighting of fires generally, in that an extinguisher can be employed in each hand of the user.

A further object of the invention is to provide a fire extinguisher which is extremely light in weight, easy and simple to operate, efiicient and positive in action.

With these objects in view, the invention consists of the novel construction of the eX- tinguislier and in certain combinations and arrangements of parts, all of which will be first fully described and afterwards specifically pointed out in the appended claims.

Referringto the accompanying drawing:

Figure 1 is a side elevation partly in longitudinal section of a fire extinguisher constructed in accordance with the invention;

and

Figure 2 is an end elevation of the same.

Like numerals of reference indica-te the same parts throughout the figures` in which:

1 indicates the device, which includes a collapsible liquid-holding container 2, the same including a readily puncturablc head or seal 3 and a deeply recessed upper end or head 4. Surrounding this container 2 is a pressboard tubular covering 5 for protecting the said container and to establish an insulation between the .container 2 and the metallic wall of the tubular housing or casing 6.

Referring to said casing 6, it will be seen that the same embodies a deep recessed upper head or end 7 adapted to enter the recessed head 1 of the container 2 and providing a space 8 around and between. the said head 7 of the casingand the head 4 of the container. "i5 The bottom 9 ofthe said head 7 is provided with a central opening 10 around which is spun an annular flange 11 to receive and retain a tubular holder or receiver 12 for a gas bomb. Permanent connection between these elements 11 and 12 is effected by the 1931. Serial No. 529,484.

annular bead 13aiid groove 14. Disposed within t-lie said casing 12 at this point of connection is a eoinpressible gasket 15 of rubber or the like` and between this gasket 15 and the partially closed end 16 of the casing 12 66 is a perforated disc 17 upon which a cartridge-puncturing device or pin 18 is mounted.

The outei' end portion of the receiver 12 is provided with preferably four longitudinal slots 19, and in this slotted portion and near the end of the receiver 12 there is rolled a bead 20, this slotted construction lending a spring resiliency to the outer end portion of the easing 12.

Disposed within this receiver 12 is a gas bomb oi' cartridge 21 containing gas under pressure and having a sealed neck 22 which snugly enters the gasket 15, and terminates adjacent the cartridge-puncturing pin` 18, while the outer end of said bomb 21 projects beyond the end of the receiver, as shown, and is provided with two annular grooves 23 and 24 to successively receive the said annular bead 20 as will be presently described.

Referring again to the recessed head 7 of the casing 6, it will be seen that, said head includes an annular rim 25 around which the end portion 26 of the casing is rolled, thus presenting a strong and stiff gas-tight joint.

27 is the nozzle-holding cap of the casing 6. This cap is. preferably outwardly convexed and centrally provided with a nozzle or outlet 28 having a central port 29 in com munication with a plurality of angularly disposed ports 30 in the sharp conical inner end or seal-fracturing device 31, which lies iinmediately adjacent the readily puncturable head or seal 3 of the container 2, and in the path of movement thereof.

Referring now to the lower end of thecasing 6, it will be seen that we provide a threaded metallic ring 32 thereat, and spin over an extending flange 33 at the extreme end of said casing 6. A plurality of holes 34 is drilled W in said ring, and the material of the casing 6 is indented into said holes -so that the said ring slightly oats on the said casing. Di-y rectly upon the said spun iange 33 is a gasliet 35 to be engaged and compressed by the 1 by the simple substitution of cap 27, said cap threading on the said ring 32 as shown. The effect of this is that a full floating scat and gas-tight joint is provided by a more perfect and a more even compression of the gasket 35 than could be accomplished h v rigidly securing the threaded ring il! to the casing' (i.

For conveniently holding the extinguisher in an accessible position, we provide a bracket .'i haring an apertured flange 37 toreceive the noz/.hl 2H of the extinguisher, and at its upper end a projecting guard 38 for protecting th(` gas bomb from casual shock or pressure such as might result in unintentional discharge ,of the gas bomb. Adjacent to said guard 38. the bracket 3G isprovided with a pair ot spring fingers 39 which embrace the cylindrical casing 6 and -detachably hold the extinguisher in position for ready removal and use.

Having thus fully described the invention its operation is as follows:

The parts being assembled as shown in the drawing, the extinguisher is removed from its supporting bracket for use. The gas bomb 2l is forced inwardly which movement carries its inner sealed end into contact with the cartridge-puncturing pin 18, which discharges the contents 'of the bomb into the space 8 between the casing head 7 and the container head 4. This movement ofthe `bomb 21 carries thc neck y22- thereof. Well within the surrounding gasket 15,=` effectively compressing the same andV establishing a pressuretight joint against leakage ofA the contents of the bomb. Simultaneously the annular groove 23 is carried` out of engagement with its complemental annular head 20, and the adjacent annular groove 24- passes into'interlocking engagement with the said annular bead 20. In this manner the gas bomb 1 is retained in its innermost position of. discharge. The container 2 being readily compressible endwise, thepressure from the discharging bomb 21 acts against the containerhead 4 and exerts an endwise collapsing pressure on the said container 2. -This pressure so exerted on the upper end of the collapsible container, the liquid contents of which are no n-compressible,V instantly forces the lower readily punctur-able container head or seal 3 into engagement withthe sharp'conical sealfracturing point 31of thenozzle 28 and establishes a connection between the port 29 of said nozzle and the contents of the receptacle. so that the said contents are discharged through said nozzle under pressure. which discharge continues until the total collapse of the container has been accomplished.

Recharging of the extinguisher is effected the collapsed receptacle 2 by a filledl receptacle, upon removal ofthe nozzle-cap 27. and by the application of a new gas bomb 21 for the one discharged.

Having thus fully described the invention, we do not wish to be understood as limiting ourselves to the exact construction herein set forth, but consider ourselves clearly entitled to all such changes and modifications that .fall within the limit and scope of the ap- .a readily puncturable head and a deeply recessed head, a metallic container casing therefor, a. nozzle-carrying cap" secured to said container casing, the nozzle of the cap having a sharp puncturing point disposed adjacent the said readily puncturahle head of said container, a. deeply recessed lread on said container casing,' the lrecessedl port-ion thereof lying within the said recessed head of said container and spaced apart from the latter, a gas bomb casing carried in the recessed head of the container casing, a gas bomb movably mounted in the gas bomb easing, a tiring pin disposed in the path of. movementy of the gas bomb for discharging the gas bomb, the said gas bomb and the gas bomb casing including resilient detent `interlocking means for retaining the gas bomb' in inactive position and in active position (if-engagement with said firing pin, and means for effecting a pressure-tight connection between said gas bomb and the gas bomb casing, the whole ar'- ranged whereby' upon `movemen't ofthe 'gas bomb into active position of Yengager'nent with said firing pin' to-dischargethe lgas bomb, the discharge therefrom' enters Athe space between the two said :recessed heads to endwise collapse the said container and move the said readily puncturableheadthereof into engagement with the punctur'ing point ofV said nozzle to establish connection of the said nozzle with the contents of the said container.

'2. A device of the'ehaacter"describedfineluding a collapsible liquid container having two heads, one of which is readilyvpuncturable, ay metallic container casing, a nozzlecarrying cap for said container casing, the nozzle of the cap having a puncturing'point disposed adjacent the s'aidreadily puncturable head of said container, a 'Ahead' v,on said container casing spaced apart from the' adjacent head of the container, algas bomb casing carried by the said head'of the containeigcasing, a gas bomb' movably mounted inl the gas bomb casing, a tiring pin disposed in thepathA of movement of thega's bombl'for, discharging the gas bomb, the said vgas'bonb and gas bomb casing includingresilient detent interlocking means for retainingthe-"gals` bomb in movement of the gas bomb into active position of engagement with said firing pm t0 discharge the gas bomb, the discharge therefrom acts upon the adjacent head of the container to endwise collapse the same and move the said readily puncturable. head thereof into engagement with the puncturing point of said nozzle to establish connection of the" tion, a casing havin a re-entrant ort-ion at one end forming a. i eeply recessed ead, said re-entrant portion having its inner or bottom end centrally apertured and having a fiangc around said aperture, a cartridge receiver disposed within the recess of said head with its inner end secured to said flange and its outer end slotted to provide a plurality of spring gripping fingers, a cartridge-puncturing device at the inner end of said receiver, cartridge puncturing means at the inner end of t-he said receiver, and a gas cartridge within the. receiver and movable against the cartridge puncturing-means, said cartridge havil'ig'an annular groove to be engaged by the spring lingers in the inactive position of the cartridge and an annular groove to be, engaged by the spring fingers 1n the active posit-ion of the cartridge.

In testimony whereof we aix our signatures.

CHARLES L. PAULUS. ROBERT KAUCH. 

